Abstracto

Variations of Water Absorption and Compressive Strengths for RHA Concrete Exposed To NaCl Medium

Pramod Sukhavasi , Chandan Kumar Patnaikuni , N V S Venugopal

India is a major rice producing country, and the husk generated during milling is mostly used as a fuel in the boilers for processing paddy, producing energy through direct combustion and / or by gasification. In reality many of concrete structures exposed to severe environmental condition exposed to mineral acids present in soil and severe aggressive condition in case of industrial area where there the durability of concrete structure is important. In the present study, variations such as water absorption and compressive strengths for 0%, 5%, 7.5%, 10% and 15% replacements of RHA concrete when cured with normal water and 5% NaCl solution is investigated. For experimentation process M25 and M35 grade of concrete are selected and variations are studied for 3days, 7days, 28days and 56days respectively. It was concluded that RHA concrete cured with 5% NaCl absorbs less water with increase in replacement proportions of RHA when compared to ordinary concrete. Nacl exhibits early compressive strength that cannot sustain for longer durations, and maximum strength is obtained at 10% replacement which can be adopted as optimum level.